[lttng-ust.git] / libringbuffer / shm_internal.h

#ifndef _LIBRINGBUFFER_SHM_INTERNAL_H
#define _LIBRINGBUFFER_SHM_INTERNAL_H

/*
 * libringbuffer/shm_internal.h
 *
 * Copyright 2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Dual LGPL v2.1/GPL v2 license.
 */

struct shm_ref {
	volatile ssize_t index;		/* within the object table */
	volatile ssize_t offset;	/* within the object */
};

#define DECLARE_SHMP(type, name)	\
	union {				\
		struct shm_ref _ref;	\
		type *_type;		\
	} name

#endif /* _LIBRINGBUFFER_SHM_INTERNAL_H */
Commit	Line	Data
1d498196 MD	1	#ifndef _LIBRINGBUFFER_SHM_INTERNAL_H
	2	#define _LIBRINGBUFFER_SHM_INTERNAL_H
	3
	4	/*
	5	* libringbuffer/shm_internal.h
	6	*
	7	* Copyright 2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
	9	* Dual LGPL v2.1/GPL v2 license.
	10	*/
	11
	12	struct shm_ref {
	13	volatile ssize_t index; /* within the object table */
	14	volatile ssize_t offset; /* within the object */
	15	};
	16
	17	#define DECLARE_SHMP(type, name) \
	18	union { \
	19	struct shm_ref _ref; \
	20	type *_type; \
	21	} name
	22
	23	#endif /* _LIBRINGBUFFER_SHM_INTERNAL_H */